Where is the radiator shutter switch for the Ford Focus?

[DelSteven]

The Ford Focus does not have a radiator shutter switch; it uses a water temperature sensor signal for control. When the car is first started and the engine coolant temperature is low, the radiator shutter will automatically close. The car radiator, generally referred to as the car's cooling system, consists of three parts in the engine water cooling system: the inlet chamber, outlet chamber, main plate, and radiator core. Below are the steps for adding water to the car radiator: 1. Turn the pressure cap counterclockwise. If you hear a hissing sound, wait until the sound stops before opening it. 2. Add an appropriate amount of coolant to the coolant expansion tank, ensuring the level is between the MAX and MIN marks. 3. With the coolant expansion tank cap open, start the engine. 4. After starting the engine, the coolant level in the tank will gradually decrease. At this point, add more coolant to the expansion tank until the level reaches between the MAX and MIN marks again. 5. Reinstall the cap, ensuring it is hand-tightened and fully seated.